Improve configure --help output.

The AC_PATH_XTRA macro includes a pretty non-specific help message, we
can hack it a bit to produce a description more consistent with other
UI options.

diff --git a/configure.ac b/configure.ac
index 912adf0355f6a666b02dc1ee451df45bb0ac2adb..fbc8f77da2bcc8a263089812feccf94663fbd06b 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -31,7 +31,7 @@ AH_BOTTOM([#include <conf_post.h>])
 
 # Checks for curses
 AC_ARG_WITH([curses], [AS_HELP_STRING([--with-curses],
-  [use curses for playing in text mode (default: auto)])],
+  [build UI for text mode via curses (default: auto)])],
   [], [with_curses=auto])
 AS_IF([test x"$with_curses" != x"no"],
   [DX_LIB_CURSES([have_curses=yes], [have_curses=no])])
@@ -44,6 +44,11 @@ AM_COND_IF([HAVE_CURSES],
 DX_CHECK_CURSES_MOUSE_SUPPORT])
 
 # Checks for X11
+m4_copy([AC_ARG_WITH], [save_AC_ARG_WITH])
+m4_pushdef([AC_ARG_WITH], [m4_case([$1], [x],
+  [m4_popdef([$0])$0([x], AS_HELP_STRING([--with-x],
+    [build UI for the X Window System (default: auto)]), m4_shift2($@))],
+  [m4_pushdef([$0], m4_defn([save_$0]))$0($@)m4_popdef([$0])])])
 AC_PATH_XTRA
 AS_IF([test x"$no_x" != x"yes"],
 [AC_CACHE_CHECK([for Motif], [dx_cv_have_motif],